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4th Nov. TJISONDARI S'HAL & AMOY 7th Nov. 9th
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JAVA.
THE TROPICAL GARDEN OF EDEN. Follow this flag on the comfortable steamers of the JAVA-CHINA-JAPAN LIJN to JAVA. Gorgeous motoring along hundreds of miles of Asphalt roads.
Famous Botanical Gardens of BUITENZORG, Smouldering Volcanoes,
Ancient Hindu Burubudur and Mendut Temples. -Native Art and Art Craft.-Numerous cool Mountain resorts 3,000-6,300 feet altitude.
A round-trip that takes 3 to 4 weeks to be remembered for a life-time..
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4.
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SHANGHAI, KOBE, YOKOHAMA, SAN FRANCISCO, LOS ANGELES, NEW YORK & BOSTON
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for Passenger and Freight information please apply :----
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Queen' Buildings. ! Agents.
MASTERS' REPORTS.
The master of the Borneo Maru ahích arrived yesterday from Moji
La very good voyage. reporta
Telephone 0. 1080.
•
THE HONG KONG DAILY PRESS, SATURDAY,
The master of the Benclench (Capt. J. Struth) says that during the voyage from Manila urong N.E. wind and rough seas wore ex- perienced and the sky was overéist.
THE MANUFACTURE AND TRIALS OF DIESEL ENGINES..
ENGINEER-CAPT. MICHELL, R.N., DESCRIBES PERSONAL EXPERIENCE.
LECTURE TO LOCAL "ENGINEERS' INSTITUTE." ·
Engineer-Captain W. H. Michell, M.L.Mech. E., R.N., lectured at the Institution of Shipbuilders & Engi- neers yesterday on "Some Difficul tics in the Manufacture and Trials of Diesel Engines."
Mr. L. J. Blackbura (President) was in the chair and a large num ber of members attended.
to seven feet long and 36 inches diameter; we made a cylinder of these dimensions to test the machine and on completion we gauged it to be within .0005 inch, true at all Parts
ནཱ།
|
OCTOBER 19, 1929.
Money and Markets
F
BENJAMIN & POTTS'
WEEKLY REPORT.
To get the correct adjustment ahead and astern of Diesel valve, inlet and exhaust valves for eight cylinders was a job in itself and occupied about forty bours The design of the starting gear neces sitated the throwing over of all eight cylinders from air to fuel; I think it would have been prefer HONG KONG SHARES. able to do this in two stages by to fuel first; putting four on originally the starting and setting were all combined in one hand- wheel but this was found imprae- ticable during the sea trinik al- though it was satisfactory in the shop; on one occasion our fore- man succeeded in getting sixteen starts out of the starting air system without re-charging, but this was largely kaack and judgment. Our method of running-in the bearings was by a motor directly coupled on the shaft the other side of the starting torque of the motor was dynamometer; as, however, the not sufficient to overcome the static friction and to start the engine this was done by air and the motor pick. ed up the engine while it was run- ning.
By running the engine for several hours with the forged lubrication pump going the friction
was reduced from a maximum load of 500 amperes to about 360...
Messrs. Benjamin & Potts, local share and general brokers, in their weekly share report dated yesterday
state:-
1
Miscellaneous.-The demand for Green Island Cements has con- tinued unabated throughout the week and they have changed bands to a considerable extent at rates ranging from $11 to 113 for cash and corresponding rates forward. Hong Kong Ropes are firmer with buyers at $91 Telephones were benker at the enhanced price of $8. Watsons were put through at 8111. and continue in request. Dairy Farmis closed appreciably higher at seid.
Amusements are on offer at.
The market bas again shown con. siderable activity during the week and prices generally have further. Lane, Crawfords are enquired improved.
for at 1.35. Denquets Consolidat.
ara
hai:
Anglo-Javas.... Anglo-Dutch Batu Anama Chemors Consolidateds Kroewoeks
..Tls, 10 buyers
1.08 "
1.85 "
41 IT
21
1.85.
1.58
Tebongs
Ziangbes
.......
2.83
9.60
Repahs
Tannha Merahs
Raw rubber is quoted at Bid.
rate
сп
Exchange.-The TT. London to-day is 1/0 and on Shang- lini 783.
Forward Settlement Daya-Oct.
Aluminium Alloy Pistons. uminium alloy pistons was only The manufacture of the al
Banks-Hong Kong and Shang; eds are steady at ) and Kailans carried out after very considerable
hai Banks have further advanced
7/8. difficulty. The piston was in two
and sales were made up to 81,385.
Cotton Mills-Evos bave shown a Captain Michell said :-
parts, a crown and a skirt and
They are quoted in London £12s fairly big drop, no doubt owing to There are numerous papers pub hollowed out to carry the piston
(Middle).
the political situation in the North lished in the transactions of the cooling oil. The top was an in-
Marine and Fire Insurances, but they close with buyers at Tis various Institutions on the results vorted dome and was tested to 1,000
Unions have had a further rise and Shanghai Cottons are also of trials run with Diesel engine of lbs. per sq. in, and the interior
have been booked up to 8383. There lower at Tis, 64 and Tls. 65 for the various types. Paramount among was heated to 60 iba per sq. in the
are buyers of Cantons at 2000 and Old and New shares respectively. these are the very valuable reports ruling thickness was about two in-
Rubbera-The following are to- Hong Kong Fires at $315, while published by the Joint Committee ches. The pistons were made of
Underwriters have had transactions day's cabled quotations from Shang- of the Institutions of Mechanical "Y" alloy which contains 4 per The next stap was to introduce at the improved quotation, of $9. Engineers and Naval Architects on cent Cu, per vent, Ni. and 1.3 per fuel into the engine and this was Shipping.Hong Kong, Canton the results of shop and sea trials cent. Mg. and the tensile test was done one cylinder at a time while and Macao Steamboats have agnia of five different types of engines 10 tons per sq. inch breaking load the motor was running, two cylin-stiffened and were bought at 1271, for five different vessels. In none with an elongation of 3 per cent. ders would just about take all the although buyers are only offering of these however is "any mention after heat treatment. The mixing load off the motor so, as the third 201 at the close. Shell Transporta made of diffic ies in construction of the metal was done in stages, was put in, the motor switch was are higher in London and were and it is wi some of these met a small quantity of copper and a broken and it was allowed to quoted 100/- (Middle). Indos with in my o ́n experience that I
uminium and of nickel and al-revolve freely to prevent its greut- Preferred
are enquired for at propose to deal this evening. Many uminium being mixed up to formerating. We had several short rune $43. The deferred shares paper are read on the design and "hardeners:" these were melted up on these lines, putting in and cut- steady at $70. running of machinery generally, with the necessary amounts of alting out different cylinders, to but only casual and very sketchy uminium to give the required mix- make sure the pipe connections references are made to say fai ture: half the magnesium being ad- lures in design or running; the readed at this time and the remainder son is not far to seek, any such when the metal was being teemed paper must necessarily be in the in a large ladle previous to pour nature of a give away. However, ing. The cast weight of the larger the difficulties I am bringing behalf of the piston was about 600 fore you were at such a distance of lbs; point which crops up in this Lime and space that I can look connection is that the ordinary 300 back on them without any soreness
lus. moulder's pot holds 300 lbs. The particular engines deals with of brass but only 100 lbs. of al- in this paper were a pair of eight rauminium and to cast 700 s. cylinder four stroke single acting meant straining our resources to reversible Diesel engines designed the uttermost, representing the to run at 300 reys, to develop 3.000 same amount of labouras, say, one B. H. P. on cylinders 21 inch. diam.
tön of brass. The metal was molt- ed in Morgan's oil fired crucibles, by 21 inch. stroke. It was essen- tial that the weight should be kept ad pot fires; we had also to a minimum and that the time Schwartz oil fired cupolas, but pre- of building should be as short as ferred not to use them on account possible. The construction adopt of the danger of burning the metal: when the metal was all thoroughly ed was a cat steel bedplate and entablature, the eight cylinders be mixed and melted it was poured ing carried on separate cast steel into a one-ton ladle and the re- sandwich plates and with a separate mainder of the magnesium added: cast steel head, the liners were of the temperature of melting should C.I. with welded steel jackets gal- not exceed 750deg. C. and the tem- vanised. The crankshaft consisted Perature of pouring should not ex. of two separate pieces, each with cecd 660dez C. This temperature four throws forged out of the solid was taken with an ordinary ther and hollowed throughout for light-me-couple pyrometer, being below ness and to carry the forced lubri. that which can be registered by the cation. The pistons were of the disappearing flament pyrometer. trunk type of aluminium alloy and After casting, these pistons were were cooled by oil circulation rough machined and tested intern through a system of swinging arms ally before being subjected to heat Cooling of the jackets and heads treatment, was by salt-water with a separate. system for cooling the exhaust valves by means of flexible rubber
tubes.
Blow-holes in Castings, Great difficulty was experienced throughout with the steel castings, owing to blowholes; and my experi ence of steel castings in the last few years has been distinctly disap- pointing, no maker seems to be able to supply continuously satisfactory eastings even of the simplest form and the industry does not seem to have advanced in reliabil ity during the last twenty years. The total length of the en- gine was approximately 28 feet; the bedplate was divided into three sections and the entablature into four and when received the first portion of the bedplate was 3/3 inch. too long and could not be cut down without unduly reducing the flanged ends; the air compressor was fitted at the forward end of the engine and the main crank shafts were machined, but it was
The cooling oil pipes to the pas tons gave considerable trouble with breakages; these consisted of steel swinging pipes with manganese bronze vertical links.
The forced lubrication and pis. ton cooling oil pumps and the eir culating water pumps were all of the centrifugal type, each direct
PASSENGERS.
Arrivals.
Docks, Wharves and Godowna.-- Hong Kong and Kowloon Wharves were correct before starting off on show a farther rise and are in de a recorded run agaidat the brake. mand at $148. Whampoa Docks We had a new Herman & Froude changed hands at 832) and more reversible brake the principle of
can be placed. China Providents 29. Nov. 26, and Dec. 23, 1929, which is well-known, the water
have advanced and a large business being pumped from one side of the casing to the other by the cup- Hongkew Wharves are wanted at was done between $5 and $53. shaped recesses, the power develo-Ts. 100, while Shanghai Docks at ed is balanced by series of weights T. 141 and New Engineers at Tis. on the end of a lever arm and on 8 closed nominal. this large size the weights were recorded on a steelyard 58 Tons of Water An Hour Needed,
heat developed in churning the The work done is absorbed by the water, consequently a supply of about four gallons per H.P. per our is necessary to prevent an excessive rise of temperature; this in our case ran to 12,000 gallons, say $3 tons, per hour and tho
makers recommended $
stendy
Lands, Hotels and Buildings. Hong Kong Lands, after being looked at $87) have buyers at 387. Hong Kong and Shanghai Hotels through at $10.00. Humphreys have further strengthened and were put buyers at $14.60 while Realtys at 881 marked a risc.
The following passengers arrived". hai on October 17:-Mr.. N. B. by the & Kamo Haru from Shang- Birge, Mrs. C. L. Blandin, Mr. Gordon Endors, Mrs. G. Endars, Mr. Fred, Gammel, Mrs. F. Gam- Gregory, Mr. Jean Helary, Mr. Tai mel, Miss M. Gainer, Mrs. R. Kikuchi, Mr. Toyohiko Mishima Mra Mishima, Mrs. Michiko Public Utilities.-A further im- Ohtani, Master T. Ohtani, Mrs. A.. Kong Electrics which were placed Mr. A. G. Rutherford. Mr. Roy. provement is to be noted in Hong G. Pillsbury, Miss Eliz. Pillsbury. up to 865. China Lights were L. Teigler, Mrs R. L. Teigler, MF. at various H. Takemura, Drs. H. Takemura, dealt in extensively rates up 14. Hong Kong Trama, Mr. Y. M. Wong, Mr. Chin San also hardened and sales wore re- Ku, Mr. H. D. Heh, and Mr. A. J. ported at $19.60. Star Ferries are M. Morgado, again higher and are sought for at: 872.
sill with the starting siz bottles charged once.
supply pressure of twenty the, per 8. in. We fixed up some tanks in a gallery of the factory, about sixty feet above the engine, which was quite satisfactory; the capacity of the tanks bring much as to give about twenty minutes rünuing in case the supply failed, an indicator being fixed up visible from the
One engine was kept about a starting platform. We also fitted an indicator to show the position of month in advance of the other, and the brake, as, in working up or
the trials were eventually success- decreasing the speed it is necessary fully completed in the second en- to follow up, by the throttle of the gine on a Sunday afternoon; by the following Saturday at noon the engine, the addition or removal of
It is engine was completely erected on the weights on the brake. possible to empty the brake in two
the ship which was launched "a or three minutes by shutting off the fortnight after. supply and allowing it to pump itself out with the engine running instead of stopping årst and drain-
BERKELEY HOTEL. '83-67, QUEENSBORDUCH TERRACE, HYDE PARK, LONDON, W.2. Two minutes Kensington Gardens, Bases and Taber, HOT AND COLD RUNNING WATER. GAS FIRES ALL BED ROOMS." PASSENGER LIFT.
Noted for healthy position, quiet, cloan- liness, excellent food and attendance. Terms from 3 gus, per week, including four meals, bath, light and attendance: from 10/8 daily. · NŐ EXTRAS.
Tarifs from DAILY PREB8 office.
by its own electric motor; all threeing the water away, which is a DODWELL & CO., LTD.
pumps were of the vertical spindle long process. It is of course neces type with the motor above and discharge and shut
sary to keep a strict watch on the down im- pump below. The oil pumps were
We drowned in their tacks, thus ea- medintely it begins to fail. suring against loss of suction, these were very chary of using this pumps were multi-stage pumps to
mechotk at first, but adopted it later obtain the necessary pressure. The without any mishap. The supply cil passed through coolers on the of circulating water in sufficient discharge side of the pumps, sup-quantities presented quite & pro- plied with salt-water from the eir. blem; fortunately there was avail- culating pump system.
The cir- able large motor-driven dock culator was a single stage pump.
drainage pump, and a quantity of As previously mentioned each fourteen-inch piping. cylinder head contained the fuel, inlet and exhaust valves; these were all driven from one cam- shaft, which was geared down two to one from the main crankshaft during the trials, and of tempera- by means of skew bevel gearing and a vertical shaft; the air starting valves were all grouped together in box at the centre of the enginės and driven by a separate cam- shaft.
Measurements and Records, Measurements and records were taken of all oil and water used
fuel was carried out by the use of
tures. The measurement of the in time to allow another 3/8 inch.
dual calibrated tanks on the after air compressor couple
with ing and to fit a horseshoe piece on
switch-cock at the bottom; these the forward ange.
were Alled by gravity from a large Continuous dieulty was experi.
overhead tank. The measurement of enced in obtaining satisfactory Trouble was experienced in run-
the flow of lubricating and piston beada: these were admittedly fairly ning the skew gearing of the verti- cooling oil was carried out by flow- complicated casings of box section enl shaft: na originally fitted it was meters fitted on the pipes; and the with holes for the inlet, exbaustnade in the usual manner (ie, a measurement of the circulating and Diesel valves and connections steel driving part and a metal dri-water for the engines, air com for the blast air and starting air. ven part in this case phosphor pressors and exhaust valves whe One place where difficulty was ex- bron) but more satisfactory re- measured similarly; in later trials perienced was in the groote for the aults were obtained eventually by C.I. jointing ring connecting to the a phosphor bronze worm driving a sandwich plate; this was approxi- steel wórmwheel. mately 6/8 inch, wide and it was absolutely essential that it should have a perfect jointing surface, but it was remarkable how many small blow holes were discovered in this particular area. Another weak spot was where the blast air hole was drilled through the casting and in several cases we had to fit tubes to get over the sponginesa,
this was done more securately by passing this water over a notched weir on top of the circulating water tank. Temperatures were read at the various inlet and outlet points. The temperatures of the exhaust outlets were read by a nine-point pyrometer; this instrument was fitted on the starting platform and by pushing the various buttons in succession the temperature of each exhaust or of the main pipe could be rend instantaneously. Exhaust gases were analysed; and in later trials the amount of blast air was dened and ground to size. This measured by a Kent's air meter, was then used as a former on a this was just under of per cent. of cam-cutting lathe in which the the induction air. In addition to screw for the surfacing motion is the ordinary indicator, diagrams removed and the carriage is con- were taken by an optical indicator; trolled by a strong spring pressing in using this instrument it is pos- it back on the former which is sible to see the diagram being mounted on a back shaft parallel "draw, as it were by the epot of to the feed screw; the machining light
Main Cam Shaft. The main cam-shaft carried ́a double set of cams for ahead and astern running. The manufacture of these cams was an exceedingly dif- ficult and delicata operation; cams were mounted in pairs ahead and astern and each pair was made in one piece. A master cam was mark No trouble was experienced by us ed off to the drawing and prepared with the forgings; these were all most carefully by milling, then har purchased rough machined so that any difficulties had been overcome before they came under our charge; the remaining parts were made by We were very successful with the C.I. liners, having only one failure in 18 castings and this was only spongy in the skirt portion; the upper parts of the liner as well as and case-hardening was followed by The shop trials consisted of a the top of the piston and face of the very careful jigging, any errors due preliminary six hours run develop- head, the parts subject to the full to caso-hardening being correcteding half power, a recorded run of ↑ pressure, were all tested to 1,000 la and the lower part of the liners to 100 lbs, only; it was here that one casting was found spongy, To finish the liners internally we installed a new grinder by Messrs. Churchill capable of grinding up
ua.
in the subsequent grinding.
To steady the running of the en- gine a large C.I, flywheel was made, this was also adopted for the shop turning gear and was graduated in degrees to facilitate the adjustment of the valves.
72 hours at 00 per cent, to full. power, and an eight houre full power trial, also a three hours trial astera at 90 per cent, full power; reversing trials ami trinks' to as- certain how may starts were pos-, (Continued on next Column).
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